Equalizer for Line Audio

First off, I really love the Centrafuse interface. I think is one of the best innovations for CarPC. I recently installed the MJS SCC1 USB adapter and SCC1 universal receiver. Everything is working fine, but I have one small quirk. I appears the equalizer does not work on the line-in stream. Is there a config that allows this or will I have to install a separate EQ to make this work. The bass input on the Sirius Stream is high and the high end of the spectrum is low. I'd like to correct this using an EQ preset.